Extrusion apparatus



Oct. 18, 1932. c. c. BUNKER 1,333,531

' mxrnusxou Arm'rus Filed June 23. 1923 3 Sheets-Sheet 1 INVENTOR.

' C4 ln -oko CBu/v/mw f A TTORNEYJ C. C. BUNKER EXTRUSION APPARATUS Filed June 23. 1928 3 Sheets-Sheet 2 ATTORNEYS L :8 CLIFFORD CBumrE/i' Oct. 18, 1932.

Oct. 18, 1932. c. c. BUNKER nxmusmu APPARATUS 3 Sheets-Sheet 3 Filed June 23, 1928 C4 lF/ORD C. BUN/ff BY 6 ATTORNEY; 1

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Patented Oct. 18, 1932 UNITED STATES \PATENT OFFICE CLIFFORD C. BUNKER, OI 'I'ALL ILDGE, OHIO, ASBIGNOB TO THE AKRON STANDARD HOLD COMPANY, 01' AKRON, OHIO, A. COBPOB ATION OHIO EXTRUSION' A?PABA'IUS Application filed June 28, 1898. Serial No. 287,711.

lhis invention relatesto machines for extruding heavy plastics such as rubber. One purpose of the invention is to provide an improved apparatus of this type in which gxthe screw is more efiectively mounted to withstand the heavy loads thereon and the bearin s and driving instrumentalities are more e actively lubricated.

Other purposes are to provide means for vfacilitating withdrawal of the stock from the feeding hopper b the screw and improved means for contro ling the plasticity of the stock. V The fore oing and other purposes are at tained by t e apparatus illustrated in the accom anying drawings and described below. t is to be understood that the invention is not limitedto the specific form thereof shown and described. 4

0f the accompanyin drawings,

Figure 1 is a ongitu inal section througha rubber-strainer embodying the inventlon;

Figure 2 is a section on line'2--2 of Figure 1;

Figure 3 is a section on line 3-3 of Figure 1;

Figure 4 is a detail elevation, partly broken awa to show interior construction of the lubricant pump;

Figure 5 is a detail section showing in side elevation the separator for preventing see ing of the lubricant from the bearin s;

igure 6 is a detail section showing t. e se arator in end elevation igure 7 is a top dplan o the chest for supplyin the fluid rue iums used for controlling the asticit of the stockand Figure 8 is a bottom plan of the exhaust chest therefor.

Referring to the drawings, the numeral 10 designates a suitable sup ortin structure or base on which is mounts a jac et '11 for an expressing tubs i2 in which is operable an expressing so Jacket 11 is formed lie. with a. hopper for delivering the rubber to the enpressirw and a strainer 15 is se cured to said acket through which the rubber is espressed ifor said tube.

Jacket 11 is provided with chambers 16 and 17 extending about the same and adapted to is arranged in the receive fluid mediums such as steam or water for controlling the plasticity of the stock.

To control supplyof steam or water to each of chambers 16 and 17 a supply chest 18 is mounted on the upper side of jacket 11. Steam and water pipesare connected thereto respectively at 19 and 20 delivering the steam and water respectively to longitudinal asthe chest which is connected to chamber 17 by a duct 30. A further control upon the plasticit of-the stock may be had by chambering t e strainer 15 at 15 and 15" to which piping is connected as shown, whereby cool} ing or heating mediums may be supplied to the chambers.

An exhaust chest 31 is provided on the under side of jacket 11 having a chamber 32 for receiving the fluid medium from chamber 16 through a duct 33 and having a chamber 34 for receiving the fluid mediums from chamber 17 through a duct 35. Valves 36 and 37 respectively are arranged to control flow of the mediums from chambers 32 and 34 to a drain 38.

To eifectuate feeding of the material from the hopper 14 by the screw 13, the inner wall of the tube 12 at, and adjacent to, the hopper is formed with grooves 12' inclined toward the direction of extrusion to resist any tendency for the material to ride around on the screw, and cooperating with the screwto feed the stock forwardly.

The driving of screw 13 is accom lished by the use of wormgear 40 arrange to be driven by a. worm 41 both contained in ahousing t2 and the gears meshing in a lubricant 4:3 contained in said housing. Worm 41 is journsled in the housing and driveuin any suitable way as by motor 4d. 1%. coolzn coil housing to noel t e oil therein. I

Gear 40 is journaled upon a central sleeve- 46 fixed in the housing and is secured to. a flange ring 47 keyed upon a quill 48 journaled in sa d sleeve 46 on end bearings 49 and 50, a thrust bearing 51 being arranged between a shoulder 46 on sleeve 46 and a shoulder 48' on quill 48. The screw 13 is keyed extending passage.

r 59 is arranged to deliverdust by 40 Lubrication of bearings 49, 50 and 51 is arranged for by the provision of a pump 52 driven by worm 41, pump 52 being arranged to force oil from the bottom of housing 42 through a connection 53 into a conduit 54 connected to a duct 55 formed in sleeve 46, duct 55 having branches 55" and 55" leading to bearings 49 and 51 and a branch 55 supplying lubricant to'bearing 50.

The lubricant is prevented from seeping out of bearing 49 by means of a separate ring 56,

i Vthe inner periphery of which is wedge-shaped and. extends close to the periphery of the quill. Bin 56 carries a. separator 57 comprising a b ock' riding on the quill and urged yieldingly against the quill by a spring 58. The end of the separator toward which the quill rotates Figure 5) is of wedge-shape as indicated at 5 This construction functions to keep the oil within the ring 56 and to keep .dust and dirt of the stock from working into the bearings. A conduit 59 is arranged to deliver oil flowing out through bearing 49 back into the bottom of casing 42. A duct avit from the outside of separator ring 56 t roug the jacket member 11. I Supply of a heating medium to screw 13 which 18 hollow is provided for by arranging;

a central supply pipe 60 through the quill, thus providing a passage 61 about the pi from which the eating medium may drained.

Modifications of the invention may be resorted to without departing from the spirit thereof and the scope of the appended claims.

What is claimed is 1. In an extruding machine, a screw, a driven quill holder keyed loosely thereto, a sleeve member in which the screw and the qlixull are journaled, said member supporting t erem bearings for the quill at each end thereof and also an intermediate thrust bearing between shoulders on the sleeve and quill, a worm gear journaled about said member and connected to the quill at the end thereof, a driving worm meshed with the worm gear at the bottom thereof, a casmg aboutthe gearing defining. a reservoir for lubricant about the gears and worms where they are meshed, a pump driven I for su by the worm, connection to the pump for suplying lubricant from the reservoir to said earings, a separator acting on the screw beyond the inner end bearing to keep the lubricant in the casing and to keep dirt out of the casing, and a connection between the se arator and the inner bearing for returning ubricant to the reservoir. v

2. In an extrudin machine, the combination with a screw, 0 a jacketed sleeve member in which the screw is 'ournaled, means for passing fluid through t e jackets of said sleeve members, said sleeve member supporting therein bearings for the screw at each end thereof and also an intermediate thrust bearing betw een. shoulders on the sleeve and screw, a gear journaled about said member and connc eted to the screw at the end thereof, a driving gear meshed with the ear at the bottom thereof, a casing about t e gearing defining a reservoir for lubricant about the gears where they are meshed, a pump driven y the driving gear, connectlon to the pump lying ubrlcant from the reservoir to sai arings, a separator acting on the screw beyond the inner end bearin to keep the lubricant in thecasing and to cap dirt out of the casing, a connection between the separator and the inner bearing for returning lubricant to the reservoir, and a passage on the opposite side of the separator ring from said connection to allow dirtor the like to escape from the machine.

3. In an extruding machine, the combinationwith a screw, of a sleeve member in which the screw is journaled, said member suplportingtherein bearings for the screw at eac end thereof and also an intermediate thrust bearing between shoulders on they sleeve and screw, -aworm gear journaled about said member and connected to the screw at the end thereof, adriving worm meshed withthe worm ear at the bottom thereof, a casing about t e earing defining a reservoir for lubricant a out the gears and worm where they are meshed, a pum driven by the worm, and connections to t e pum for supplying lubricant from the reservoir to said bearings.

4. In an extruding machine, the combination with a screw,of a sleeve member in which the screw is journaled, said member supporting therein bearings for the screw at each end thereof and also an intermediate thrust bearing between shoulders on the sleeve and screw, a gear journaled about said member and connected to the screw at the end thereof, a driving gear meshed with the. ear at the bottom thereof, a casing about t e gearing definin a reservoir for lubricant about the ears w ere they are meshed, a pump driven y the driving gear, and connections to the pump for supplying lubricant from the reservoir to said bearin 5. In an extru ing apparatus, a screw I journaled in a housing, a hopper over the screw adjacent the inner side of the housing,

' screw.

6. In an extruding apparatus, a sleeve, a driven quill journaled therein, an extruding passage, and ascrew therein, said screw being connected at one end in the quill to be driven thereby, said connection being loose to permit slight movement of the screw out of exact alignment with the'quill whereby considerable strain is relieved from the quill bearings.

7. In an extruding machine, a screw, a driven quill holder keyed loosely thereto, a sleeve member in which the screw andthe quill are journaled, said member supporting therein bearings for the quill at each end thereof and also an'intermediate thrust bearing between shoulders on the sleeve and quill, a worm gear journaled about said member and having driving connection with the quill at theend thereof, a driving worm meshed with the worm gear at the bottom thereof.

8. In an extruding machine, a housing and a sleeve having aligned axial bores, a quill, means radially journalling said quill at both said worm gear, a worm for driving the worm gear, means for lubricating said bearings, and a separator ring between said screw and said quill to keep the lubricant in the bearin s and the dirt out, said separator ring including a wedge-shaped element yieldingly urged against the quill.

- 11. In an extruding machine, a housing, a screw, means including a quill connected to the screw for journaling the screw, in the housing, a hopper on said housing, means for lubricating said journaling means, and a separator ring between said hopper and said journaling means to keep the lubricant in said journaling means and the dirt out, said separator ring including a wedge-shaped element yieldingly urged against the quill.

CLIFFORD C..BUNKER.

ends thereof in said sleeve member, intermediate thrust bearing means between shoulders on the sleeve and quill, a screw loosely keyed-in said quill and carried in said housders on the sleeve and quill, a screw loosely Gil ing, a worm gear journaled on said sleeve, a flange ring secur ng said quill to said worm ear and a worm for drivin said worm gear.

9. In an extruding machine, a housing and a sleeve having aligned axial bores, a uill, means radially j ournalling saidquill at 0th ends thereof in said sleeve member, intermediate thrust bearing means between shoulkeyed in said quill and carried in said housing, a worm gear journaled on said sleeve, 2. flange ring securing said quill to said worm gear, a worm for drivin said worm gear, means for lubricating said bearings, and a separator ring between said screw and said quill to keep the lubricant in the and the dirt out.

10. In an extruding machine, a? housing.

and a sleeve having aligned axial-'bores,. a quill, means radial journalling said quill at both ends thereo in said sleeve member,

intermediate thrust bearing means between shoulders on the sleeve and quill, a screw loosely keyed in said quill and carried in said housing, a worm gear journaled-on said sleeve, a flange ring securing said quill to bearings 

